System.JSON.TJSONNull Methods

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InheritedProtected

AddDescendant	protected	Method used by the parser to reconstitute the JSON object structure.
AfterConstruction	public	Responds after the last constructor has executed.
AsTValue	protected	Fills the specified AValue instance of TValue with the value of this JSON null value, encoded using the specified type. It returns True if the specified type is supported or False otherwise.
BeforeDestruction	public	Responds before the first destructor executes.
CheckDisposed	protected
ClassInfo	public	Returns a pointer to the run-time type information (RTTI) table for the object type.
ClassName	public	Returns a string indicating the type of the object instance (as opposed to the type of the variable passed as an argument).
ClassNameIs	public	Determines whether an object is of a specific type.
ClassParent	public	Returns the type of the immediate ancestor of a class.
ClassType	public	Returns the class reference for the object's class.
CleanupInstance	public	Performs finalization on long strings, variants, and interface variables within a class.
Clone	public	Declares the method that should create a deep clone of the current JSON value.
Create	public	Creates an instance of TJSONNull.
DefaultHandler	public	Provides the interface for a method that processes message records.
Destroy	public	Destroys this instance of TJSONNull.
Dispatch	public	Calls message-handling methods for the object, based on the contents of the Message parameter.
DisposeOf	public	DisposeOf forces the execution of the destructor code in an object.
Equals	public	Checks whether the current instance and the Obj parameter are equal.
EstimatedByteSize	public	Declares the method that should return the estimated byte size of the current JSON object.
FieldAddress	public	Returns the address of a published object field.
FindValue	protected	Finds and returns a TJSONValue instance located at the specified APath JSON path. Otherwise, returns nil.
Free	public	Destroys an object and frees its associated memory, if necessary.
FreeInstance	public	Deallocates memory allocated by a previous call to the NewInstance method.
GetDisposed	protected	Getter for the Disposed property.
GetHashCode	public	Returns an integer containing the hash code.
GetInterface	public	Retrieves a specified interface.
GetInterfaceEntry	public	Returns the entry for a specific interface implemented in a class.
GetInterfaceTable	public	Returns a pointer to a structure containing all of the interfaces implemented by a given class.
GetOwned	public	Getter method for the Owned property.
GetValue	public	Finds a TJSONValue object located at the specified APath JSON path, casts this JSON value as the T JSON type and returns this value. Otherwise, returns ADefaultValue.
InheritsFrom	public	Determines the relationship of two object types.
InitInstance	public	Initializes a newly allocated object instance to all zeros and initializes the instance's virtual method table pointer.
InstanceSize	public	Returns the size in bytes of each instance of the object type.
IsNull	protected	Always returns True since any TJSONNull instance represents a JSON null value.
MethodAddress	public	Returns the address of a class method by name.
MethodName	public	Returns the name of a class method by address.
NewInstance	public	Allocates memory for an instance of an object type and returns a pointer to that new instance.
QualifiedClassName	public	Returns the qualified name of the class.
SafeCallException	public	Handles exceptions in methods declared using the safecall calling convention.
SetOwned	protected	The setter method for the Owned property.
ToBytes	public	Serializes the JSON null value into an array of bytes.
ToJSON	public	Returns the string representation of this JSON object.
ToString	public	Returns a 'null' string.
TryGetValue	public	Finds a TJSONValue object located at the specified APath JSON path, casts this JSON value as the T JSON type and fills AValue with the obtained JSON value. Returns True on success or False otherwise.
UnitName	public	Returns the name of the unit where the class is defined.
UnitScope	public	Returns the class's unit scope.
Value	public	Returns the JSON null value as a string: "null".